Question

Predict the products of the following reactions. Complete the word equation and provide BALANCED chemical equations (BCE). [10] balance reactant equations A) iron (III) sulfide + sodium phosphate ----->

Answer 1

1) Write the formula of both reactants.

Iron (III) sulfide = Fe2S3

Sodium phosphate = Na3PO4

`Fe_2S_3+Na_3PO_4\text{ =}`

2) Expected products

Iron(III) phosphate: FePO4

Sodium sulfide: Na2S

3) Complete equation (unbalanced)

`Fe_2S_3+Na_3PO_4=FePO_4+Na_2S`

4) Balance Iron (Fe)

`Fe_2S_3+Na_3PO_4=2FePO_4+Na_2S`

5) Balance Sodium (Na)

`Fe_2S_3+2Na_3PO_4\text{ = }2FePO_4+3Na_2S`

After balancing Iron and Sodium the chemical equation is completely balanced.

6) Word equation

Iron (III) sulfide + Sodium phosphate = Iron(III) phosphate + Sodium phosphate